/// <summary>
/// Open a new output file.
/// </summary>
/// <remarks>Any existing file will be closed.</remarks>
private void OpenFile()
{
//clear the existing file pointer to make sure if we fail, it's gone.
//we also rely on this to distinguish adding a new file to an existing stream.
CloseFile(false);
//increment our session file counter since we're going to open a new file
m_CurrentSessionFile++;
//Calculate our candidate file name (with path) based on what we know.
string fileNamePath = Path.Combine(m_RepositoryFolder, MakeFileName());
//now double check that the candidate path is unique
fileNamePath = FileSystemTools.MakeFileNamePathUnique(fileNamePath);
//we now have a unique file name, create the file.
FileSystemTools.EnsurePathExists(fileNamePath);
m_CurrentFile = new FileStream(fileNamePath, FileMode.CreateNew, FileAccess.Write);
//and open a serializer on it
m_CurrentSerializer = new GLFWriter(m_CurrentFile, Publisher.SessionSummary, m_CurrentSessionFile, DateTimeOffset.Now);
//write out every header packet to the stream
ICachedMessengerPacket[] headerPackets = Publisher.HeaderPackets;
if (headerPackets != null)
{
foreach (ICachedMessengerPacket packet in headerPackets)
{
m_CurrentSerializer.Write(packet);
}
}
//and set a time for us to do our next index update.
m_FileExpiration = DateTime.Now.AddSeconds(m_MaxLogDurationSeconds);
}
/// <summary>
/// Inheritors must override this method to implement their custom message writing functionality.
/// </summary>
/// <remarks>Code in this method is protected by a Queue Lock
/// This method is called with the Message Dispatch thread exclusively.</remarks>
protected override void OnWrite(IMessengerPacket packet, bool writeThrough, ref MaintenanceModeRequest maintenanceRequested)
{
//Do we have a serializer opened?
if (m_CurrentSerializer == null)
{
//we do not. we need to open a file.
OpenFile();
}
//now write to the file
m_CurrentSerializer.Write(packet);
if (writeThrough)
{
OnFlush();
}
//and do we need to request maintenance?
if (m_CurrentFile.Length > m_MaxFileSizeBytes)
{
maintenanceRequested = MaintenanceModeRequest.Regular;
}
else if (DateTime.Now > m_FileExpiration)
{
maintenanceRequested = MaintenanceModeRequest.Regular;
}
}